Automatic thermostatic fuel-controlling device.



J. A.-MA YERS. AUTOMATIC THERMOSTATIC FUEL CONTROLLING DEVICE.

APPLICATION FILED APR. 28, l9l5.

Patented Oct. 31, 1916.

ATTORNEY UNITED STATES; PATENT OFFICE.)

JOSEPH ALEXANDER MAYERS, OF BROOKLYN, NEW YORK.

AUTOMATIC THERMQSTATIC FUE -C NTROLLING DEVICE.

To all whom it may concern. i

Be it known that L'Josnrn Mam-mom MAYERs, a citizen of the lfnited States, and

.resident of Brooklyn, county of Kings, and

State of New York, have invented certain new and useful Improvements lIl Automatic Thermostatic 'I IieLContI-oHiug Devices, of

' perature.

The foregoing and other objects I attain by employing four chambers whichare inclosed against the atmosphereand connected with each other in series; an inclosed column of air expansible element; a looped transmission-tube, of substantially inverted U- shaped contour; a heat-generating burner, a pilot-burner, and an inlet and outlet fuel pipe, and mercury contained Within the said chambers, all as will'be hereinafter fully described and specifically set forth in the annexed claims.

In the accompamng drawings formmg part ofthis specification, Figure l is a burner.

longitudinal sectional view illustrating my invention; Fig. 2 a sectional plan view taken on the line. 22 of Fig. 1; and Fig. 3 isa cross section taken on the line 3-3 of Fig. 1, showing a. detail of my invention,- drawn on an enlarged scale. 7

In theexample of my invention shown in the accompanying drawings and particu-- larly illustrated by Fig. 1, the apparatus is shown in a position supplying gas to a A and B, indicate respectively chambers which are separated from each other by a partition C; and said chambers communicate with each other by means of a looped transmission-tube D, of substantially inverted U-shaped contour, which embodies the parallel legs or channels 1 and 2, which are extended vertically, and the lateral loop 3, which is extended horizontally. Said chamber. A contains at its bottom enough mercury a to reach to the bottom of the leg 1 of the transmission-tube D, and at least half as much more mercury as will fillthe transmission-tube. The chamber A Specification of Letters Patent.

Patented Oct. 31 1916.

Application filed April 28. 1915. Serial No. 24,479. U j

communicates with a thermosuttic-cnamber la, containing an air theri'nostatic med um and having its upper section 0, placed in mntact with or near the object to be heated to in sucha mann as to have its contents affected by the temperature of the object to be heated. For example, in the case ofa boiler, as M, shown-in Fig-1, it is extended into said boiler. i i

The chambers A and B, respectively contain a quantity of mercury indicated by a leg dipping in the mercury a in chamber A,

'and I and the transmissiou-tube Dhas one and the other reaching to the top of the mercury 7), in chamber B, andthe lateralextension or part 3 of said transmission-tube is located. outside of the chambers A and B, and bent laterally. 'lliesaid transmission? tube is composed of pliable orvmalleable metal, and its loop adaptedto swing, for changing its elevation, by bending, said bending operation being accomplishedby turning the screw 4, through the post. 5,

said screw being swiveled at 6, and coin nected with the free end of bend or loop 3', ot the transmission-tubc, by mcans of .the

eye 7. A block 8 contacts with the tube D, and the post 5 is located adjacent thereto,

said I post forms a rigid bearing, through which the screw 5 is threaded, and it and the block 8 form bearing surfaces on which the transmission-tube D, can be bent without risk of breaking same at thepoints where the vertical legs thereof respectively emerge from the lid or top wallof the chambers A and B. This mechanism is for the purpose of raising or lowering the elevation of the transmission-tube to vary the height'or distaucethe mercury is required to travel.

I The chamber B is supplied with mercury Z), up to the level of the bottom of the leg 2, of the transmission-tiibc which is within said chamber B. Couuuunicating with the chamber B, by means of an opening 9,100

through the partition (Z, is a chamber F,

. which is adjacent to a chamber (i, and separated therefrom by a partition r a latorally contracted and vertically.elongated passage-way II leads doumwardly from the chamber. F and.communicates at its bottom with an opening 7L, leading to a passage-Way I, which leads upwardly into the chamber G;.these passage ways" are clon gated to prevent thermostatic commun ication between. chambers F and G, due-to any eX- tremes of temperature; mercury i, is placed/ in the chambers F and G, insufiicient quantity to have its u per surface normally below the bottom 0 the ipe J, to permit gas to leave chamber G tlirou h said pipe J. Leading into chamber G, fromany source of fuel-supply is a pipe 10, for supplying fuel to the burners K and L. The pilotburner L, being connected by the tube 11, with the fuel supply pipe 10 before the latter enters chamber G and ahead of a valve 12, which is a burner shut-off valve of ordinary type; said tube 11 is also provided with a shut-off valve 13.

To illustrate the operation of my invention, let us assume that fuel shall be turned on full at 130 and kept full on until the object to be heated reaches 150. apparatus for this condition, disconnect the upper part of chamber E, via-the section 'e, from the lower part, at the joint f, closing valves 12 and 13. ,Bend the external portion or loop 3 of the-transmission-tube upa ward until its top is elevated above its bottom opening and at a height equal toa column of mercury that will sustain a pressure equal to that caused by the raising ofthe temperature of the thermostatic medium in the upper part of chamber A from 130 to 150, Hot water is then placed in the boiler at,130,-or the water. is brought to that temperature by a temporary heating device, in order to bring the mediumin the thermostatic member to 130 temperature. Now connect the lower section of the thermostatic-chamber E with the upper section' e, by making up joint f. Now 0 n valve 13 and light the pilot-light at the urner L, and then open valve 12, when gas will immediately flow with full volume through the pi e 10 down to the bottom of the tube J, an through to the burner K, and will be ignited by the pilot light. A full volume of'gas will continue to flow to the burner, and when the temperature of the object to be heated gets just past 150, or just over 20 above the temperature from which it" was raised, the mercury 11 the leg 1 of the transmission-tube D, wil be driven upward through it and across the loop 3,

and downward through the leg 2, into chamber B, and as the mercury which is forced from A to B is so small an amount-only suflicient to half fill the transmission-tube it will spread out in the bottom part of chamber B and cause only a very shallow seal in B. The leg 2, now acts as an outlet from the chamber A, for the thermostatic medium; the compressed medium in said chamber A, under the thermostatic pressure,

will rush instantaneously through the transmission-tube, from chamber A into chamber .B'and will break through the thin seal in B, following through chamber B to chamber F, through the opening 9, forcing the mercury in chamber F down the passage way To set the -ber E is contracted, causing a tendency to vacuum, which pulls the mercury in chamber B, up leg 2 of the transmission tube D, until the vacuum gets just greater than that caused by' the dropping of pressure from 150 to 130, or a loss of temperature just above 20 from its maximum temperature of 150, when the mercury is ulled across the transmission-tube, down 1, and is deposited in chamber A, which hen permits the contraction of the thermostatic medium in chamber E to breakthe slight seal then formed in chamber A and to pull the medium back from chamber B, and

therefore also from chamber F, raising the mercury in chamber F and dropping the mercury suddenly below the opening or lower end of the tube J, in chamber G, again permitting gas to supply the burner.

It will be noted that while the temperature of the thermostatic medium in E is rising or falling between the predetermined temperatures for which the appliance is act, that there is a gradual and minute rise or fall in the mercury level in chamber G, due, in the first case, to the addition to the medium in chamber B of a volume of the medium equal to the volume in half the transmission-tube D; and in the latter case, to the exit of an equal quantity of mercury leaving chamber B through the transmission-tube, D. The preliminary elects however are so minute, both in the rise and fall of the mercury in chamber G, as colupared with the ultimate major instantaneous movement in chamber G, that they are ncg- 'the two chambers, one leg to a chamber and the connecting portion of the .l o the transmission-tube, otherwise the d therein, passing through the walls separating the two chambers A- and B, but such a ccnne'ction' would not permit the changing of the elevation of the free end of thetr ans- I mission-tube without removin parts of the walls of the chambers in'or er to get at same. It is also possible to make all of the walls of each. chamber entirely separate 9 one or more openings depending in chamber from the others and connecting the necessary openings with piping, or other details G, etc, and any of these may be used, as any opening presented to the rise and fall of the mercury in chamber G will be closed or opened by said mercury.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is:

1. A thermostatic device comprising adjacent chambers closed to the atmosphere and containing respectively a column of mercury in their bottom parts, and a thermostatic chamber closed to the atmosphereand containing an expansible medium, said thermostatic chamber communicating with one of said mercury-containing chambers; fuel inlet and outlet pipes arranged in one of said mercury containing chambers; a transmission-tube of substantially inverted U-shape embodyinga laterally bent loop and vertical legs depending therefrom which extend respectively into two of said mercury-containing chambers and means for bending said loop, whereby the elevation of its free end may be varied for regulating the travel of mercury therethrough and comprising a bearing-block, a post and av screw threaded through said post, said screw havinga swiveled eye engaging said loop, substantially as shown and described.

In a thermostatic device, the combination, with a thermostatic-chamber closed to the atmosphere and containing an expansible medium, a chamber having an opening leading into said thenecstatic-chamber and closed to the atmosphere and containing mercury, and a chamber adjacent to said last named chamber and also containing mercury and closed to the atmosphere, a fuel inlet pipe and a fuel outlet pipe disposed i n. one of said chambers, of a looped transn'i-ission-tube of substantially inverted U-shape connecting said mercury-con taining chambers and adapted for transferring mercury alternately to and from said chambers and manually operable means for rcgulating the n'u'ivement of the mercury from said chambers to the chamber containing the inlet and outlet pipes, substantially as shown and described. a

3. In a thermostatic device, the combination, with a thermostatic chamber closed tothe atmosphere and containing an expansible medium, a chamber communicating with said thermos!atic-chambcr and closed to' the atmosphere and containing mercury, chambers adjacent to said last named chamber and also containing mercury and closed to the atmosphere, fuel inlet and outlet pipes arranged in one of said chambers, ofa transmission-tube comprising two vertical legs and a lateral loop connecting them, 'said legs depending from said loop into the first named mercury-containing chambers establishing communication between them, said transmission-tube composed of pliablematerial whereby the free end of its loopmay be raised and lowered for varying its elevat on, substantially as shown and described and means engaging the lateral loop for regulating the passage of the mercury through the transmission tube to the other of said chambers. I e 1 4c. Ina thermostatic fuelcontrolling device, the combination, with a closed thermostaticchamber containing expansible medium, two closed transmission-chambers containing mercury, one ofwhich communicates with said therniostatic-chamber, and two adjacent chambers which communicate with each other, and fluid-scaling means within all of said chambers, all of said chambers closed to the atmosphere, and a looped transmission tube connecting the transmission chambers whereby thesealing means may be transferred from one to the other, and, a fuelinlet pipe, and a fuel outlet pipe, substantially as shown and described.

5. In a. thermostatic fuel-controlling de vice, the combination, with a closed thermostatic-chamber containing an expansible, medimn, two transmission-chambers one of which communicates with said thermostatic chamber, and two chambers closed to the atmosphere and communicating with each other and. with the said transmission chamher which does not communicate with said medium,and two transmission-chambers one 120 ol which comn'mnicatcs with saidthermostatic chamber, and two chambers closed to the atmosphere and communicating with each othe' and with the said transmissionchambcr which does not communicate with 125 ['1 said thermostatic chan'iber, all of said chambers containing n'iercury in their bottom parts, and a tr:u1smissiontube of substantially inverted U-shape adapted for transferring mercury back and forth to and from said transmission chambers; of a fuelinlet pipe, a fuel outlet pipe, a heat generating burner, a pilot burner, and a heated object, substantially as shown and described.

7. In a thermostatic fuel-controlling device, the combination, with a closed thermostatic-chamber containing an expansible medium, two transmission-chambers one of which communicates with said thermostatic chamber, and two chambers closed to the atmosphere and communicating with each other and with the said transmission chamber which does not communicate with said thermostatic chamber, all of said chambers containing mercury in their bottom parts, one of said two last named chambers being larger in area than the other; of a transmission-tube of substantially inverted U- shape and comprising means for communication between said transmission-chambers 0 nerating burner, a pilot :5 

